diff options
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c index f0f069c1823c..b42477b6a225 100644 --- a/block/bio.c +++ b/block/bio.c @@ -2034,6 +2034,24 @@ static void __bio_associate_blkg_from_css(struct bio *bio, rcu_read_unlock(); } +/** + * bio_associate_blkg_from_css - associate a bio with a specified css + * @bio: target bio + * @css: target css + * + * Associate @bio with the blkg found by combining the css's blkg and the + * request_queue of the @bio. This takes a reference on the css that will + * be put upon freeing of @bio. + */ +void bio_associate_blkg_from_css(struct bio *bio, + struct cgroup_subsys_state *css) +{ + css_get(css); + bio->bi_css = css; + __bio_associate_blkg_from_css(bio, css); +} +EXPORT_SYMBOL_GPL(bio_associate_blkg_from_css); + #ifdef CONFIG_MEMCG /** * bio_associate_blkg_from_page - associate a bio with the page's blkg |